I have a 4agze turbo and put in HKS cams. 272 intake and 288 exhaust. It sounds like a beast in idle lol. I would suggest upgrading the valve springs as well. If you are sticking with the stock ecu and supercharger, I don't know if there would be much benefit from doing this though. What are your future build plans with the engine?

Okay well if you dont plan on running an aftermarket ecu just run the pulley and see how you like it. It might be good enough without the cams or ecu. It really just depends what you want out of the car.

Alex170984 wrote:would I benefit from some HKS 264 cams or stick with stock?

Increased duration is not so desirable with a supercharged engine, as longer cams increase overlap and allow some of the intake charge to escape to the exhaust without being burned. On the other hand, increased lift does offer benefits. So if you have adjustable cam pulleys you can close up the separation angle a little to reduce overlap and still get the benefit of more lift.

There is a bit more to selecting cams for a supercharged engine than for N.A. You can easily end up with less rather than more if you get it wrong. For the moment I would suggest that you go with the above advice and stay with the stock cams for a while. Then you can research the cam question in more depth to see what works with the factory ECU, and what kind of gains are possible.

Cheers... jondee86

Give a person a fish, they eat for a day. Suggest they search before posting, and they learn a skill for a lifetime.

Jon, that's what I was thinking! I'm going to stick with the standard camshafts for the time being. I'm going to be running a bigger pulley so I do not want to complete things by throwing in some cams that the ECU may have issues running.

Well Jondee, the MAP version can cope with that set of cams. There's still overfueling at the top end at every flatchange(powershift), you know. I've used that set for 13 months and without an intercooler. No problems other than a twisted axle in the diff and spiderwebbed stock flywheel at the end of that period......

I have the larger 176mm fensport pulley but run on standard cams. I personally do not feel that it needs bigger cams. It idles really well and I have had higher lift and longer duration cams on my N/A before and it just didn't run right at idle. I did consider different cams in this but would rather spend money and time like yourself designing a better airflow and dealing with the heat soak. I will be considering running my IC in the boot or a GT4 charge cooler setup.

You could always try and snag a pair of early large port cams (1984, 85, possibly some 86 4A's) supposedly the early blue tops had 240 duration instead of the late 16v 4A 232(?) Duration. Can't say for certain about the difference in duration but the early cams do have 7.5mm lift instead of 7mm in the later ones, I scored a pair of cams out of an 85 mr2 in the junk yard for $60 and compared. Now I'm not sure what benefit 0.5mm of lift will do, but for $60 its a super low risk option till i figure out what I want to do, so im going to give it a go. Haven't installed them yet as my car is still in the process of being put together, but I just figured it was another option to consider. Can't go wrong with stock parts on a stock ecu right?? lol

BTW seeing that you want to use stock parts, what kind of clutch set you guys have?

I had stock 200mm and 212mm sets used from Fidanza, Toda etc. for the OEM flywheel. Only the one from Illegal Garage lasted more than six months. And I didn't drift my AE86 regularly, but I did dragracing a lot.